WASHINGTON - Senate Democrats intend to approve a budget for the first time in almost four years, a prominent lawmaker said Sunday, but he said it will call for higher tax revenues that Republicans are sure to oppose.

Sen. Chuck Schumer, D-N.Y., said an announcement by House Republicans that they plan to approve a short-term increase in the nation's borrowing limit without demanding spending cuts was "positive step."

He added, though, the extension should be longer than the three months they have outlined.

"We don't want to play fiscal cliff every three months," Schumer said.

Republicans in recent days have backed away from their insistence that they would not increase the nation's borrowing limit - known as the debt ceiling - without deep spending concessions.

If the new proposal holds, the shift would clear the way for Congress to avoid a potential government default this spring.

Tax code overhaul

Sen. Ted Cruz, a Texas Republican, said he supports the strategy from his party's leaders in the House.

"There is no doubt the Senate hadn't done its job," said Cruz, who was elected to his first term in November. "It's been nearly four years since it's passed a budget. And the Senate should pass a budget."

The Senate Republicans will get a budget from the Democrats, Schumer said.

"We Democrats have always intended to do a budget this year," Schumer said, adding the Democrats' budget would raise taxes while offering overhauls to the tax code likely to find Republican support.

"We're going to do a budget this year and it's going to have revenues in it. And our Republican colleagues better get used to that fact," Schumer said.

White House backs plan

The White House, too, said it remained committed to what officials called a "balanced" approach to cutting the nation's $16.4 trillion nation debt. Asked by ABC's George Stephanopolous whether Obama "will only sign a budget deal if it includes new revenues," White House senior adviser David Plouffe agreed.

"Yes, it's got to be balanced," said Plouffe. "We need spending cuts, entitlement reform and revenue. We have to have that."

Plouffe said the new Republican strategy reflects a weak opposition after November's election that gave Obama a second term.

"This is a big departure for them, you know?" Plouffe said .

House Republican leaders on Friday offered Obama a three-month increase to the nation's credit card and a dodge to a looming, market-rattling debt crisis. They backed off demands that any immediate extension of the government's borrowing authority be accompanied by stiff spending cuts.

They also added a caveat designed to prod Senate Democrats to pass a budget: no pay for lawmakers if there again is no budget passed this year.